a penthouse in manhattan, homes in palm beach and the south of france, and yachts in both places. >> he was a big figure in the industry. he was the chairman of nasdaq. he was constantly being honored as "man of the year" of this organization and that. and that--that had an effect on me. >> both sons went to work as traders for their father's firm in the late '80s, a time authorities believe madoff's ponzi scheme was well under way. why would your father want to taint his sons by bringing into a situation that could, well, spell disaster? >> you know, that's-- that's a great question. and that's something that i really agonize over as a son. you know, what my father did was so horrible. and it's hard for me to-- hard for me to understand that. >> bernard l. madoff securities employed over 100 people, but it seemed like a family business. his brother peter and several cousins worked there. mark and andrew worked on the 19th floor of new york's lipstick building, where they legitimately traded securities for the firm and for outside clients. the investment advisory business--the ponzi